Case: Staging and production copies of a WordPress 5.4 website on the same server. Activating QueryMonitor 3.9.0 on Staging work, but throws `Fatal error: Cannot declare class QM_PHP` on Production.
Author: yavo
Partition Scheme For Running Grub on XFS
Case: After a fresh install of Linux Mint 20.3 on an XFS-partitioned drive, GRUB boots to a command prompt for no apparent reason.
Note: Issue appears to be distro-agnostic.
How to Enable Shared Folders on Virtualbox for Linux Guest?
Q: How to Enable Shared Folder on Virtualbox for Linux Guest?
A: sudo adduser $USER vboxsf
Failed Blockchain Transaction With Error ‘UniswapV2Router: INSUFFICIENT_B_AMOUNT’
Case: Error manifests as INSUFFICIENT_A_AMOUNT as well, when attempting a token swap at a DEX or locking funds as liquidity. Has been observed on different chains: Ethereum, Fantom, etc.
Continue reading Failed Blockchain Transaction With Error ‘UniswapV2Router: INSUFFICIENT_B_AMOUNT’
How to add a script to Linux start via terminal
Q: How to add a script to Linux start via terminal?
A:
crontab -e
@reboot /path/to/script
src: https://askubuntu.com/questions/814/how-to-run-scripts-on-start-up
Basic Security Checklist for Ubuntu Server 20.04
Contents
- Disabling SSH login via the root user
- Changing default sshd port
- Generating RSA SSH keys on the local machine
- Copying RSA.pub key to the server
- Disabling plain-text password logins (enforcing RSA key usage)
- Setting up Uncomplicated Firewall UFW
Continue reading Basic Security Checklist for Ubuntu Server 20.04
nmap scanning only 1000 ports
Q: nmap scanning only 1000 ports
A:
By default, Nmap scans the most common 1,000 ports for each protocol.
[..] you can specify
-p-to scan ports from 1 through 65535.
Python 3 PIP Warning: Consider adding this directory to PATH
Case: Running Ubuntu 20.04 w/ Python 3.8 (python3 executable). Installing a script with pip install returns a warning that the path of the script is not present as an environment variable:
WARNING: The script undervolt is installed in '/home/<username>/.local/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Continue reading Python 3 PIP Warning: Consider adding this directory to PATH
SSH-keygen Returns Error on Key Creation “No Such File or Directory”
Case: Running ssh-keygen prompts “Enter file in which to save the key”. Entering a custom location returns “no such file or directory” error.
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How To Uninstall VMWare Player on (Solus) Linux
Q: How To Uninstall VMWare Player on (Solus) Linux?
A: sudo vmware-installer -u vmware-player